Bunk bed stair



FIG. 1 is a left, front perspective view of the bunk bed stair showingmy new design;

FIG. 2 is a left, rear perspective view thereof;

FIG. 3 is a left, rear perspective view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a perspective view of the bunk bed stair showing my newdesign; the broken lines shown in FIG. 7 are for the purpose ofillustrating the environment in which the bunk bed stair are associatedand form no part of the claimed design.

CLAIM The ornamental design for bunk bed stair, as shown and described. 